Visit our Alexandria or Castle Hill Showrooms! Gem Windows and Doors are Sydney's leading aluminium and timber windows and doors suppliers.

It provides good air ventilation. Aluminium awning windows have their easy operational chain winder, maximum view with less framing. One thing. With more than 30 years experience in the design, manufacture and installation of aluminium windows and doors, we have seen trends change over time. Our 30 years experience in the glass and construction industry which makes us the right choice to manufacture and install your aluminium windows, doors.

Architectural Glass, Aluminium & Steel - Fabrication & Installation - Design & Construct - Windows & Doors - Shopfronts - Frameless Glass - Sydney based. We stock a wide range of aluminium window, door & framing systems for residential commercial & industrial applications | Darley Aluminium is an Australian. An Australian owned and operated market leader in the design and distribution of innovative aluminium systems for commercial and residential projects.